Tim Clem : win32u: Correct the packed size of WM_GETDLGCODE when lparam is NULL.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: c8bc841405e89b88659c6954e81cb244650c40c3
URL:    https://gitlab.winehq.org/wine/wine/-/commit/c8bc841405e89b88659c6954e81cb24...

Author: Tim Clem <tclem(a)codeweavers.com>
Date:   Thu Sep  7 09:55:44 2023 -0700

win32u: Correct the packed size of WM_GETDLGCODE when lparam is NULL.

---

 dlls/win32u/message.c      | 2 +-
 dlls/win32u/tests/win32u.c | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/dlls/win32u/message.c b/dlls/win32u/message.c
index d15f9af3f9f..d2909339983 100644
--- a/dlls/win32u/message.c
+++ b/dlls/win32u/message.c
@@ -1691,7 +1691,7 @@ size_t user_message_size( HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam,
         size = sizeof(STYLESTRUCT);
         break;
     case WM_GETDLGCODE:
-        size = sizeof(MSG);
+        if (lparam) size = sizeof(MSG);
         break;
     case SBM_SETSCROLLINFO:
     case SBM_GETSCROLLINFO:
diff --git a/dlls/win32u/tests/win32u.c b/dlls/win32u/tests/win32u.c
index efc7249eca7..e118d081ead 100644
--- a/dlls/win32u/tests/win32u.c
+++ b/dlls/win32u/tests/win32u.c
@@ -1063,7 +1063,6 @@ static void test_inter_process_child( HWND hwnd )
     ok( res == 4, "res = %d\n", res );
 
     res = NtUserMessageCall( hwnd, WM_GETDLGCODE, 0, 0, NULL, NtUserSendMessage, TRUE );
-    todo_wine
     ok( res == 1, "res = %d\n", res );
 
     mdi.szClass = "TestClass";